Electromagnetic workholding means



May 20, 1924.

1,494.661 J. BRENZINGER ELBCTROMAGNET I C WORKHOLDING MEANS Filed Feb. 9 1922 5 Sheets-Sheet 1 INVENTQR.

ATTORNEY May 20, 1924.

J. BRENZINGER -ELECTROMAGNETIC WORKHOLDI'NG MEANS Filed Fb. 9

1922 5 sheets-sheet 2 21v VENZOR 19% I A TTORNE Y May 20, 1924.

J. BRENZINGER ELECTROMAGNETIC WORKHOLDING MEANS Filed Feb. 9 1922' s Sheets-Sheet 5 Z 11v Vb NTOR A TTORNE Y May 20, 1924.

1,494,661 ,1. BRENZINGER I ELECTROMAGNETIC WORKHOLDING MEANS Filed Feb. 9 3922 5 Sheets-Sheet 4 May 20, 1924.

J. BRENZINGER ELECTROMAGNETIC WORKHOLDING MEANS 1922 5 Sheets-Sheet 5 Filed Feb. 9

HVVENTOR ATTORNEY Patented May 20, 1924.

UNITED STATES 1,494,661 PATENT OFFICE.

JULIUS BRENZINGER, OF FAIRFIELD, CONNECTICUT, ASSIGNOR TO THE MAX AMS MACHINE COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF NEW YORK.

ELECTROMAGNETIC WORKHOLDING MEANS.

Application filed February 9, 1922. Serial No. 535,380.

To all whom it may concern Be it known that I, JULIUS BRENZINGER, a citizen of the United States, and a resident of Fairfiold, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Electromagnetic \Vorkholding Means, of which the following is a specification.

This invention relates generally to electromagnetic work holding means and more especially to a dial feed associated with head ing or seaming machines used in connect-ion with metallic containers and has for its main object and feature the provision of means whereby electric current from a stationary source may be conducted to a revoluble or rotatable member. Other features of invention will appear as the specification proceeds.

In the accompanying drawings the invention is disclosed in a concrete and preferred form in which Fig. 1 is a side elevation, partly in section, of a seaming machine and dial feed, the latter carrying electro-magnetic work holding means embodying the invention.

Fig. 2 is a vertical sectional view on the plane of line 2-2 of Fig. 1.

Fig. 3 is a fragmentary top plan view, in section on the plane of line 3-3 of Fig. 4, and partly broken away.

Fig. 4 is a vertical sectional view on the plane of line 44; of Fig. 3.

Fig. 5 is a bottom plan view of one of the chucks obtained by taking a section on the plane of line 55 of Fig. 4t.

Fig. 6 is a detail vertical sectional view on the plane of line 66 of Fig. 3.

Fig. 7 is a top plan View, partly broken away, of a modified form of the invention, showing a plurality of poles in connection with each chuck.

Fig. 8 is a vertical sectional view on the plane of line 8-8 of Fig. 7 p

The invention may be applied to many forms of seaming or other machines but in the embodiment chosen for illustration the construction is as follows:

1 indicates a power shaft having a bevel pinion 2 meshing with a bevel gear 3 on upright shaft 4 which latter drlves a rotatmg head 5, in this instance continuously. Seaming tool 6 is rotated by means of spur-gears 7 and 8 and upright shaft 9. The detail construction of the'seaming tools may take many forms and the in-and-out movement of said tools is here produced by means of a train of: spur gears 10, 11, 12 and 13, the motion being derived from upright shaft 14. 15 is a revoluble supporting member, in this instance moved intermittently, and carried by this supporting member are a plurality of chucks or work-holding means 16. These chucks are rotatable about their own axes and are also vertically movable in the support ing member. Suitable means are provided for intermittently revolving the supporting member 15 taking in this instance the following form: 17 is a horizontal shaft preferably driven from the main shaft by means of pulleys 18 and belt 19. Mounted on this main shaft is a worm 20 meshing with a worm wheel 21 mounted on a vertical stub shaft 22. Bolted to worm wheel 21 is a member 23 carrying a pin or roller 24 engaging with the slots of a Geneva wheel 25, in a manner well understood, keyed to a vertical spindle 26 on which supporting member 15 is mounted. Moving with worm wheel 21 is a bevel gear 27 meshing with another bevel gear 28 on horizontal shaft 29 and this shaft drives upright shaft 14; by means of bevel gears 30 and 31. Shaft '29 also carries a cam 32 which acts against the raising mechanism 33 which latter in turn elevates each chuck as it comes into position under head 5.

The parts so far described are all well known and act in the following manner. Supporting member 15 is advanced intermittently in a rotary path thereby bringing successive chucks into position under the revolving head. When each chuck reaches this position it is elevated by cam 32 thereby pressing the work against rotating head 5 and thus causing the work to rotate. The seaming tools, which are constantly rotating, then advance and recede successively to perform the seaming operation. The chuck then descends thereby lowering the work out of contact with the revolving head after which supporting member 15 is advanced another step to bring a new chuck into position with respect to the revolving head and the seaming tools.

The work that the machine performs is the uniting of a container body and a bodyend. Specifically, the container body is here shown as that of a wash-tub or pail 34 and the body-end is a bottom 35. Considerable difficulty has been experienced when placing the work on the chuck or workholder to re tain the parts in the proper position prior to the seaming operation because the bottom 35 is placed loosely on the washtub or pail and is apt to become displaced during successive movements of the supporting member and oneof the objects of this invention is to prevent displacement of the parts of the work.

The number of chucks or work-holders may, of course, vary but in the present instance four such chucks are provided and as all of them are alike only one will be described. 1 V I Supporting member 15 is provided with a bearing 36 bolted thereto by meansof bolt 37. The bearing is provided with a sleeve 38 for the reception of a spindle 39 vertically movable by means of cam 32 and having a collar 40 to limit the downward movement of said spindle. This spindle carries at its upper end the chuck 16, there being preferably an anti-friction bearing 41 inter posed between the spindle and the chuck. The chuck in detail is constructed as followsi spindle 39 has an upright extension 42 on which is loosely mounted a carrying member 43 having a circumferential supporting ledge 44 to which is bolted a support 45 for the reception of a container body in an upright position. Secured to carrying member 43 is a housing 46 within which is seated electromagnetic work holding means here shown'as an electro-magnet 47. Housin 46 is here shaped generally as a cup-shape member as shown and carries at its upper enda spacing member 48 that tends to center the container body on support 45. Secured to the underside of carrying member 43are two annular contacting members 49 and 50 and connected to these contacting members are. binding posts 51 and 52 from which conductors 53 and 54 lead to to the magnet. Fixed on spindle 39, and therefore stationary with respect to the rotating chuck, is 'a bracket 55 and in this bracket are mounted two spring pressed contacts56 and 57, said contacts sliding in hollow binding posts 58 and 59. It will now a be understood that a source of supply of ourto rent being connected to binding posts 58 and 59, the current will be transmitted to the magnet from said source notwithstanding the rotationof thechuck and notwithstandin the container body placed on support 45 and when a body-end such as bottom 35 is placed on the work holding means the magnetic attraction of said magnet will prevent displacement thereof;

The means for connecting the current source to binding posts 58 and 59 may vary widely, and will depend somewhat upon the number of chucks or work holders, but in the present instance the arrangement is as As will be follows: 60 represent the intake leads connected to switch 61. From this switch conductors 62 and 63 pass through a piping 64 to the center of supporting member 15 where they pass up through tube 65. Tube 65 carries a stationary insulating bracket 66 provided with two binding posts 67 and 68 to which the wires are attached. The binding posts are hollow and have spring pressed plungers 69 and 70 acting as contacts and engaging annular contact members 71 and 72 mounted to revolve with supporting me1nber 15. In this way current from a stationary source outside of the supporting member 15 may be conducted to means revolving with said member. In the present instance, the magnets of the several chucks are connected in series by means of a circuit extending from the annular contacts 71 and 72. Contacts 71 and 72 are connected to binding posts 73 and 74, and from post 74 extends a wire 75 which leads to one of the chucks,- the return wire being indicated at 76 which leads to the second chuck, the return wire from the second chuck being indicated at 77. -Wire 77 leads to a third chuck and re turn wire from the third chuck is indicated at 78 and this in turn leads to a fourth chuck, the return wirefro'm the latter being indicated at 79 and this wire 79 is attached to binding post 7 3. If desired, a housing 80 may be placed over binding posts 67 and 68 and pipes 81, extending radially, may surv round the wires leading to and from the attached. Mounted upon this head area number of magnets 89, in this instance three, which are disposed in horizontal position and extend radially of the center of the chuck. Each magnet has a pole piece85 extending up through slots 86 in the spacing member. The three magnets are connected in'series as shown, thetwo leads 87 and 88 being connected to binding posts as 51 and 52 of Fig. 4.

If desired,a tell-tale lamp 90 may be included in the circuit to give warning of any interruption'in said circuit.

I claim: j 1. A'revoluble supporting member, a rotatable chuck carried thereby, electromagnetic work holding means carried by said chuck, a'source of supply of electric current and including said electromagnetic means.

2. A revoluble supporting member, a plurality of rotatable chucks carried thereby,

electromagnetic work-holding means carried by each of said chucks, a source of suped to said source ofsupply and including said electromagnetic work holding means.

3. A revoluble supporting member, a rotatable chuck carried thereby, means for Cal automatically raising and lowering said chuck, electromagnetic work holding means carried by said chuck, a source of supply of electric current located in a stationary position at the center of rotation of the supporting member, and an electric circuit including movable contact members connected to saidv source of supply and including said electromagnetic work holding In ,ans.

t. A revoluble supporting member, a plurality of rotatable chucks carried thereby, means for automatically raising and lowering said chucks, electromagnetic work holding means carried by each of said chucks, a source of supply of electric current located in a stationary position at the center of rotation of the supporting member, and an electric circuit including movable contact members connected to said source of supply and including said electromagnetic Work holding means.

5. A revoluble supporting member, a plurality of rotatable chucks carried thereby, electromagnetic work holding means carried by each of said chucks, a source of supply of electric current located in a stationary position at the center of rotation of the supporting member, and an electric circuit including movable contact members connected to said source of supply and including the several electromagnetic work holding means in series.

6. A revoluble supporting member, a plurality of rotatable chucks carried thereby, means for automatically raising and lowering said chucks, electromagnetic work holding means carried by each of said chucks, a source of supply of electric current located in a stationary position at the center of rotation of the supporting member, and an electric circuit including movable contact members connected to said source of supply and including the several electromagnetic work holding means in series.

7. A revoluble supporting member, a rotatable chuck carried thereby, electromagnetic work holding means carried by said chuck, a source of supply of electric current located in a stationary position at the center of rotation of the supporting member, and an electric circuit including movable contact members connected to said source of supply and including said electromagnetic means to supply current uninterruptedly to said electro magnetic means notwithstanding movement of the parts,

8. A revoluble supporting member, a plurality of rotatable chucks carried thereby, electromagnetic work holding means carried by each of said chucks, a source of sup ply of electric current located in a stationary position at the center of rotation of the supporting member, and an electric circuit including movable contact members connected to said source of supply and including said electromagnetic work holding means to supply current uninterruptedly to said electromagnetic means notwithstanding movement of the parts.

9. A revoluble supporting member, a rotatable chuck carried thereby, means for automatically raising and loweringsaid chuck, electromagnetic work holding means carried by said chuck, a source of supply of electric current located in a stationary position at the center of rotation of the supporting member, and an electric circuit including movable contact members connected to said source of supply and including said electromagnetic work holding means to supply current uninterruptedly to said electromagnetic means notwithstanding movement of i the parts.

10. A revoluble supporting member, a plurality of rotatable chucks carried thereby, means for automatically raising and lowering said chucks, electromagnetic work holding means carried by each of said chucks, a source of supply of electric current located in a stationary position at the center of rotation of the supporting member, and an electric circuit including movable contact members connected to said source of supply and including said electromagnetic wor holding means to supply current uninterruptedly to said electromagnetic means notwithstanding movement of the parts.

11. A chuck comprising: a support for holding a container body in an upright position, and electromagnetic work holding means extending upwardly from said support and within the body of the container for positioning a body-end with respect to said container body.

12. A chuck comprising: a rotatable support for holding a container body in an upright position, electromagnetic work holding means mounted to rotate with said support and extending upwardly therefrom within the body of the container for positioning a body-end with respect to said container body, and a rotating head to engage with said body-end to thereby rotate the parts.

13. A chuck comprising: a rotatable sup port for holding a container body in an upright position, electromagnetic work holding means mounted to rotate with said support and extending upwardly therefrom within the body of the container for positioning a body-end with respect to said container body, a rotating head to engage with said body-end to thereby rotate the parts, and means for raising and lowering the support to bring the parts into and out of coaction with the head.

14:. A rotatable chuck, electro-magnetic work holding means carried thereby, a plurality of annular contacts carried by the chuck, means for raising and lowering said chuck, a source of supply of current located eXtraneously-of the chuck, and non-rotating spring-pressed contact members engaging said annular contacts in both the up and down positions of the chuck and connected to said source of supply.

15. A -rotatable chuck, electro-magnetic work holding means carried thereby, means for raising and lowering said chuck, a source of supply of current independent of the chuck, and an electric circuit including movable contact members connected to said electro-magnetic work holding means and said source.

16. A revoluble supporting member, a rotating chuck carried thereby, electro-magnetic work holding means carried by said chuck, a source of supply of electric current located in a stationary position at the center of rotation of saidmember, and an electric circuit including said work holding means and connected to said source, and two sets of movable contact members included in said circuit, one set to transmit current despite the revolution of the supporting member. and the otherset to transmit current despitethe'rotation of the chuck.

Signed at New York, in' the county of New Yorkand State of New York, this 31st day of January 1922.

JULIUS BRENZINGER. 

